Let us consider a quantity \( f = (f_0, f_1, \dots , f_n)\in \mathbb {R}^n\)  to model. The set of input variables of the sought model is \(q = (q_0, q_1, \dots , q_m)\in \mathbb {R}^m\) . In the context of fluid dynamics, \(f\)  may be for instance a corrective term for a RANS model (as done in [1]} or [2]}), and \(q\)  may be some local fluid variables such as the density, velocity, molecular viscosity, shear stress tensor components, etc.
